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LM3000 датащи(PDF) 4 Page - Texas Instruments

номер детали LM3000
подробное описание детали  Dual Synchronous Emulated Current-Mode Controller
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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LM3000 датащи(HTML) 4 Page - Texas Instruments

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LM3000
SNVS612A – JULY 2009 – REVISED JULY 2009
www.ti.com
Pin Descriptions (continued)
Pin #
Name
Description
17
FREQ/SYNC
Frequency set / synchronization input for internal PLL.
18
EN1
Channel 1 enable input. Used to set the emulated current slope for channel 1.
19
TRK1
Channel 1 track input.
20
SS1
Channel 1 soft-start.
21
TRK2
Channel 2 track input.
22
SS2
Channel 2 soft-start.
23
EN2
Channel 2 enable input. Used to set the emulated current slope for channel 2.
24
PGOOD2
Power good signal for channel 2 under-voltage and over-voltage.
25
COMP2
Error amplifier output for channel 2.
26
FB2
Error amplifier input for channel 2.
27
EA2_GND
Error amplifier ground sense for channel 2.*
28
CLKOUT
Output clock. CLKOUT is shifted 90 degrees from SYNC input.
29
SGND
Local signal ground.*
30
VCB2
Boost voltage for channel 2 high-side driver.
31
HG2
Channel 2 high-side gate drive for external MOSFET.
32
ILIM2
Current limit setting input for channel 2.
DAP
Exposed die attach pad. Connect the DAP directly to SGND.*
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1)
VIN to SGND, PGND
-0.3V to 20V
VSW1, VSW2 to SGND, PGND
-3V to 20V
VDD, VDR to SGND, PGND (2)
-0.3V to 5.5V
VCB1, VCB2 to SGND ,PGND
24V
VCB1 to VSW1, VCB2 to VSW2
5.5V
FB1, FB2 to SGND, PGND
-0.3V to 3.0V
All other input pins to SGND, PGND
(3)
-0.3V to 5.5V
Junction Temperature (TJ-MAX)
150°C
Storage Temperature Range
-65°C to +150°C
Maximum Lead Temperature
Soldering, 5 seconds
260°C
ESD Rating
HBM (4)
2000V
(1)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of
device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or
other conditions beyond those indicated in the Recommended Operating Conditions is not implied. Operating Range conditions indicate
the conditions at which the device is functional and the device should not be operated beyond such conditions. For guaranteed
specifications and conditions, see the Electrical Characteristics table.
(2)
VDD and VDR are outputs of the internal linear regulator. Under normal operating conditions where VIN > 5.5V, they must not be tied to
any external voltage source. In an application where VIN is between 3.3V to 5.5V, it is recommended to tie the VDD, VDR and VIN pins
together, especially when VIN may drop below 4.5V. In order to have better noise rejection under these conditions, a 10
Ω, 1μF input
filter may be used for the VDD pin.
(3)
HG1, HG2, LG1, LG2 and CLKOUT are all output pins and should not be tied to any external power supply. COMP1 and COMP2 are
also outputs and should not be tied to any lower output impedance power source. PGOOD1 and PGOOD2 are open drain outputs, with
a pull-down resistance of about 250
Ω. Each of them may be tied to an external voltage source less than 5.5V through an external
resister greater than 3k
Ω, although 10kΩ and above are preferred to reduce the necessary signal ground current.
(4)
Human Body Model (HBM) is 100 pF capacitor discharged through a 1.5k resistor into each pin. Applicable standard is JESD22-A114C.
4
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Links: LM3000


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